Repros from fox:
- host shares screen, all peers see it, then non-phone speaker loses
it after a few seconds
- hard refresh: tiles appear then disappear
Root cause: watchVideoTrackForRemoval declared the publisher gone
after 3s of mute. That's way too aggressive — a transient network
blip, NACK retransmission gap, brief CPU pressure on the publisher,
or a mobile network handoff can pause RTP for 3s without the publisher
actually unsharing. 3s mute fired remove(), tile disappeared even
though the SFU was still forwarding.
15s is enough to weather Wi-Fi stalls and mobile network handoffs
while still removing the tile within a reasonable window when the
publisher genuinely unshares.
Added logLine on both the timeout fire ('video track muted >15s —
removing tile') and the rescue ('RTP resumed before timeout — keeping
tile') so we can see what's actually happening on the receiver side
the next time something looks wrong.
Russell Ballestrini
bb1bf56527